skrf.qfactor.Qfactor.Q_unloaded

Qfactor.Q_unloaded(opt_res=None, A=None)[source]

Unloaded Q-factor Q0.

The value of the unloaded Q-factor Q0 cannot be measured directly but can be estimated from the measurement of the loaded Q-factor Q_L [MAT58] .

Parameters:

  • opt_res (None or OptimizedResult. Default is None.) – Solution produced by the fit() method. If None, uses the solution previously calculated, if performed.

  • A (float or None. Default is None.) – Scaling factor as defined in MAT 58 [MAT58]. For reflection resonance type, can be set as None to use the magnitude of the fitted detuned reflection coefficient S_V

Returns:

Q0 – Unloaded Q-factor.

Return type:

float

References

[MAT58] (1,2)

“Q-factor Measurement by using a Vector Network Analyser”, A. P. Gregory, National Physical Laboratory Report MAT 58 (2021) https://eprintspublications.npl.co.uk/9304/